Have you ever heard of the HDFury ? It was deemed illegal after a few years, don't know the current situation, but you can get one on eBay (as much as I don't like eBay company for having raised fees through the years...). It has a great DAC, I'm using the 1st version that came out with an old Nokia CRT monitor and the image is great. The 1st generations spawn 3 versions. Be carefull to choose your version as some production runs had some problems but the good ones were very very good, about as good as CRT and analog projectors can get.
Later on there were also newer versions which included a scaler but IIRC needed a modified firmware to bypass the HDCP problem. That was the way they found to circumvent it without anyone coming after them. The irony is that there are and were lower quality devices mainly from china, offering the same function on eBay and other sites and nobody said anything about those...
